The fine dust filter for wet and dry vacs is designed to tackle job cleanups like concrete dust, cold ashes, drywall dust and everyday dirt like sawdust, wood chips, jobsite debris, and car or truck dirt. This efficient cartridge filter is rated to capture up to 99% of particles as small as 1/2 micron. Removing and installing wet and dry vac filters is quick, easy and secure. For added convenience, the filter material can be washed with water and reused. To ensure maximum performance of your wet and dry vac, replace wet and dry vac filters regularly.